Références

Benini (R.), Principii di statistica metodologica. Torino, 1906, pp. 227-236.

Bosco (A.), Lezioni di statistica. Roma, 1909, pp. 329-357.

Davenport (C.-B.), Statistical methods uith spécial référence to biological

variation. New York, 1904, eh. II « on the seriation and plotting of data

and the frequency polygon ».

Elderton (W. Palin et Ethel M.), Primer of statistics. London, 1912, ch. III :

Frequency distributions.

King (Wilford), The éléments of statistical method. New York, 1912, ch. XI :

Frequency tables and graphs.

Pearson (Karl), *S7,e?f variation in homogeneous material . Philosophical

Transactions of the Royal society of London. Série A., vol. CLXXXVI

(189,5), pp. 343-414.

1d. Cloudiness, note on a novel case of frequency. Proceedings of the Royal

Society, vol. LXII (1897), pp. 287-290.

Id. Supplément to a Memoir on skew variation. Phil. Trans. Royal Soc., série A., vol. CXCVII (1901), pp. 443-459. Secrist (H.!, An Introduction to statistical methods. New York, Macmilian,

1917, eh. V, passim.

Yule (G. Udny), An introduction to the theory of statistics. London, 1911,

ch. VI : the frequency distribution, pp. 83-105. Zizek, Statistical avcragcs. New York, 1913, ch. V : formation of magnitude,

classes et IIIe partie, ch. II : the dispersion of séries, etc., B., pp. 270-

(1) Zizek, loc. cit.. pp. 352-353.